Buttonhole-sewing machine.



(No Model.)

Patented Oct. 3, I899.

J. GUTMANN, E. FALLER &. K. MISCHKE. BUTTONHOLE SEWING MACHINE.

(Application filed Oct, 3, 1898.)

9 Sheet sSheet No. 634,135. Patented Oct". 3, I899. J. ,GUTMANN, E. FALLEB & K. MISCHKE.

BUVTTONHIIJLE SEWING MACHINE.

7 (Application filed Oct. 3, 189B.) (No Model.) 9 Sheets-Sheet 2.

No. 634,135. 7 Patented Oct. 3, I899.

- J. GUTMANN, E. FALLER & K. MISCHKE.

BUTTONHOLE SEWING MACHINE.

(Applimtion filed Oct. 3, 1898.) (No Model.) 9 Sheets-Sheet 3,

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Patented Oct. 3, I899. J. GUTMANN, E. FALLER & K. MISCHKE. BUTTONHOLE SEWING MACHINE.

(Application filed Oct, 8, 1898.) (No Model.)

9 Sheets-Sheet 4,

Allllll mu [Il-IIIIHH 4 [Ill No. 634,,l35.

( lo uml.) 'i

I Pafonted Oct. 3, I899. J. GUTMANN, E. FALLEB &. K. MISCHKE. BUTTONHOLE SEWING MACHINE.

(Application filed 00b. :3, 189B.)

9 Sheets-Sheet 5 MW"- WWI Patented Oct. 3, I899. J. GUTMANN, E. FALLER & K. MISGHKE.

I BUTTONHOLE SEWING MACHINE.

(No Model.) (Application much 3 1m) s sums-shears.

WM W 5% fiZZ/zeJJeJ:

No. 634,!35. Patented Oct. 3, I899. J. GUTMANN, E. FALLER & K. MISUHKE.

BUTTDNHOLE SEWING MACHINE.

(Application filed Oct. 3, 1898.) (No Model.) a ShaetsShe et "gll t No. 634,l35. Patented Oct. 3, I899. J. GUTMANN, E. FALLER &. K. MISCHKE.

BUTTDNHDLE SEWING MACHINE.

1 (Application filed. Oct. 3, 1898.) (No Modal.) 9 Sheets-Sheet 8.

No. 634,85. Patented Oct. 3, I899. J. GUTMANN, 'FALLER &. K. MISCHKE.

BUTTUNHOLE SEWING MACHINE.

(App h'cation filed Oct. 3, 1898.) (No Model.) 9 Sheets-Sheet 9.

witnesses:

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JULIUS GUTMANN, OF BERLIN, GERMANY, AND .EMIL FALLER AND KARL MISOHKE, OF ZURICH, SWITZERLAND, ASSIGNORS TO THE FIRMA FAB- RIK FUR SPEZIALNAHMA-SOHINEN ACTIEN-GESELLSCHAFT, (PA TENTE, JULIUS GUTMANNJ OF ZURICH, SWITZERLAND.

BUTTONHOLE-SEWlNG ACHINE.

SPECIFICATION forming part of Letters Patent No. 634,135, dated. October 3, 1899.

Original application filed August 1, 1 71 gerifll To (17/ III/mm, it Duty concern.-

Be it known that we, JULIUS GUTMANN, residing at Berlin, Germany, and EMIL FALLER and KARL MISCHKE, residing at Zurich, Switzerland, have invented certain new and'useQ ful Improvements in Buttonhole-Sewing Machines; and we do hereby declare the following to be a full, clear, and exact description, of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to that type of buttonhole-sewing machines shown and described in our Letters Patent of the United States dated May 9, 1899, No. 624,793, of which application the present one is a division or continuation and has relation to the mechanism which operates the work-holder and its application to a-sewingunachine, the

needle-bar of which receives a vertical reciprocating motion only instead of such a motion and a vibrating motion, and particularly in the application of said mechanism to the well-known Wheeler & Vilson buttonholesewing machine, and whereby the edges of a but-tonhole' are bound in the usual manner, while the ends are barred by stitches laid parallel to said edges, or substantially so.

In the accompanying drawings, Figure 1 is a side elevation, and Fig. 2 a top plan View, (the overhanging machinearm being removed,) of a \Vheeler & ilson buttonholesewing machine with our improvements applied thereto. Fig. 8 is a view similar to Fig. 2, the feed-wheel and other parts being removed. Fig. 4: is an under side View of the bed-plate; Fig. 5, a detail longitudinal sectional view of said Fig. 4; and Fig.6, a top plan view of the feed-disk. Figs. 7 and 8 are detail top plan views of the system'of slides S, parts being removed in said Fig. 8. Fig. 8 is a detail section on line a; a: of Fig. 8. Fig. 9is a longitudinal section on or about on. line 2 .2 of Fig. Fig. 10 isa transverse section taken on or about on line w w of Fig. 7. Fig. 11 is a fragmentary detail plan View, and Fig. 12 is a section on line y y of Fig.

650,163. Divided and. this application filed October 3, 1898. Serial No. 692,530. (No model.)

11. Fig. 13 is an under side View of the bedplate of the machine, showing the ledge provided with the rectangular notch on the under side of slide S of the system of slides for one of the pins on coupling-lever m. ,Fig. 14 is a fragmentary elevation, partly in section, of a portion of the mechanism shown in Fig..15 as seen when looking in the direction of arrow, Fig. 15, which latter view is also a fragmentary under side view of the bed-plate of the machine.

- The stitch-forming appliances shown in the accompanying drawings are of a well-known construction and operate to impart to the needle-bar-a vertical reciprocation only and need, therefore, no detailed description.

As clearly shown in Fig. 2, the work-holder, consisting of a transversely-slotted work support P and a correspondingly-slotted clothclamp and stretcher-plate K of well-known construction and hereinafter referred to as the work-holder P K, is arranged to hold the work,with the buttonhole, transversely of the bed-plate. The said work-holder is connected with a disk 0, provided in its under face with a cam-groove 0, (shown in dotted lines in Fig. 3 and in full lines in Fig. 6,) through a system of slides S, and said disk O is connected with a feed-wheel Q in such manner as to adapt it to reciprocate thereon during the operation of barring a buttonhole, the connection between the parts being also such as to actuate the work-holder, as follows: Supposing the parts to be in the position shown in Fig. 2 and the needle N to lie close to the right-hand. edge above-the near end-of the buttonhole tocom menoe' the binding of said edge, as the needle N is reoiprocated vertically the work-holder P K receives a reciprocating motion crosswise of the buttonhole,

arrow 1, Fig. 1, and simultaneously therework-holder P K reaches the limit of its progressive feed motion i. e., the ot! or opposite wise of the huttonhole, arrow III, Fig, 2, and

simultaneously therewith a progressive feed motion crosswise of the buttonhole or in the direction of the near or lower one of the two arrows IV, Fig. 2, whereby one end of the buttonhole is barred by stitches laid parallel with the edges of the buttonhole, or substantially so.

During the barring of a buttonhole end the pin 1) (shown in dotted lines in Fig. 3) lies in the concentric portion 2 of the cam-groove 0' in disk 0', which portion 2 is made sulficien tly wide to allow said pin 11 to reciprocate with the work-holder, thus dispensing with coupling devices such as shown in Letters Patent granted-to us J u ne 20,1-899,No. 627 ,114, and in an application for patentof even date, Serial No. 692,529, with this said cam-groove havinga similar concentric portion 4 diametrically opposite said portion 2. When the off end of the buttonhole .i barred, thqparts are automatically returned into their respective positions for the binding of the opposite or left-handedge of the buttonhole, during which operation the workholder P K is again reciprocated in the direction of arrow'I, Fig. 2, while the direction of its progressive feed motion is reversed by the other portion 8 3 of the cam-groove o in disk 0' and indicated by the left-hand arrow of the two arrows II, Fig. 2. When said lefthand edge of the buttonhole is bound, the mechanism which actuat'es the work-holder will again be in position for barring the opposite or near end of the buttonhole, the work-holder receiving a reciprocating motion in the direction of arrow III and a progressive feed motion in the direction of the upper arrow of the two arrows IV, and when said end is barred the work-holder will again be inthe position from which it started.

The reciprocating motions crosswise and lengthwise of the buttonhole are imparted to the work-holder from a well-known switchcam M on the lower machine-shaft w? and the continuously-vibrated switch-cam lever M the arm m of which has a pin that works in the groove in the said switch-cam M.

As stated above, the'work-holder RK receives its feed motion lengthwise of the buttonhole from the eccentric portions of the cam-groove o in disk 0, in which groove works a pin 19', secured to a slide 19, Figs. 7 and 9, of the system of .slides S. The slide phas a guide-block p journaled to its under side, which works in an oblique groove 12, formed in a slide 10, itself provided with a like guide-block p that works in a groove 1), formed in a slide 17 which latter is guided in the slide s. This slide 8 and the lower slide .3, guided in suitable ways in the bedplate G, have motion independently of each other, as Well as with each other, under the action of two springs t t", seated in recesses in slide 8 The described arrangement of slides s s relatively to each other and relatively to the slides p p p and their construction are fully illustrated in Figs. 7' to 12 and are well known, being used on the Wheeler dc Wilson sewing-machines and will herein be referred to as the system of slides S, the work-support P being connected to slide s through slide 1), to which said work-support is rigidly secured, as shown in Figs. Sand 10.

The reciprocating motion crosswise of the buttonhole in vbinding the edges thereof and the reciprocating motion lengthwise of the buttonhole in barring the ends thereof, as

well as the required progressive feed motion,

are imparted to the work-holder by mechanisms organized and operating substantially as shown and described in our application of even date with this and may therefore be only briefly referred to. We have, however, materially simplified certain portions of this As shown in Figs. 4, 5, 13, 14, and 15, and

as hereinabove stated, the reciprocations crosswise of the buttonhole in binding are imparted to the work-holder P K from the switch cam M and' switch-cam lever M through aconnecting-bar m, connected with arm m of said lever MF and provided near its free end with a square pin that projects from its opposite faces and with an oflset or projection 'm on its under, side. The portionrrn of the aforesaid pin in bar m is held in engagement with a recess or slot m in a ledge or shoulder on the under side of the lowermost slide 3 of the systemof slides 8',

through which and the slide .9 the reciprocations lengthwise of the bed-plate G of the connecting-bar m are translated through the intermediate slide 8' to the slide p to which the work-support P is secured.

The disk 0, from the cam-groove o of which the progressive feed motion lengthwise of the buttonhole is imparted to the work-holder P K when reciprocated crosswise of such buttonhole, receives its progressive feed. motion likewise from the. continuously-vibrating switch-cant lever M, whose arm 'm is connected by a rod q with a collar or ring q, adapted to oscillate on disk 0. The ring q has pivoted thereto a pawl Q, held in engagement with the teeth of the feedwheel Q bya spring so that as the ring q is oscillated on disk 0 throughconnecting-rod q the pawl imparts the required progressive rotation to the feed-wheel, as shown in our application for patent of even date herewith.

The reciprocating motion lengthwise of the buttonhole in barring an end thereof is im-.

by said reciprocating motion is imparted to the said work-holder. This is edected through a shifting-lever Z in the path of peripheral projections l on disk 0', Fig. 3, the pin of which lever carries below the bed-plate a shiftinglever P, that carries at its free end a roller in contact with the ofiset in on the under side of lever m, so that whenv one of said projections Z acts upon said lever Z the shifting-1e- IO Ver Z will shift the connecting-bar m in the direction of arrow, Fig. 4, so as to move the pin portion m out of slot m and the portion n into a notch or in a link it, one end of which is pivoted to one-end of a link a whose other end is pivoted to the under side of the bedplate G. The. other end of link 41 is pivoted to the arm n of a bell-crank lever N", whose ,arm it" carries a pin a that projects through a transverse slot g 'in said bed-plate and has secured thereto, above the bed-plate, a slide '1', that carries a lever r, acted upon by a spring f, so as to move said lever toward said slide r. The leverr has pivoted thereto a coupling-pin r guided in a sleeve r on slide 1', which has an opening for said pin to pass through.

To the work-support P is secured a transversely-slotted plate 1 and to the latter are secured two longitudinal]y-slotted coupling- 0 plates g (1 adjustable crosswise of the bedplate G by means of set-screws (1 passing through transverse slots in said couplingplates, as shown and described in our application for patent of even date with this.

Z is acted upon by a projection Z on disk 0 to uncouple the connecting-bar m from slide 5 and couple said bar to link a and the lever 'r is free to move downward under the stress 40 of its spring f the coupling-pin r on said lever'will move through the opening in slide 0" into the slot g of one or the other couplingplate 11 g at the time below said opening in slide 7', thus coupling the work-holder P K 5 with slide r,which imparts to said work-holder a reciprocating mot-ion lengthwise of the buttonhole. During the binding ofa buttonhole edge it is, however, necessary that the coupling-pin r should be held clear of the coup- 5o ling-plates g 9 and one of our improvements lies in the simplification of this mechanism, whereby we are enabled to, dispense with the spindle and its torsion-spring shown and described in our said application of even date with this.

lever r is inclined downwardly from its outer or oif end toward its inner or near end, and the pawl r pivoted to a post on the bed-plate G and held in engagement with the periphery 6c of the disk 0 by a simple spring f has an extension 0*, that projects under the lever r and normally holds the same in its elevated position and the coupling-pin r out of reach of the coupling-plates (1* 1 It will be seen that when one of the peripheral projections t acts upon the lever Z to uncouple the connecting-bar m from slide 5 of. the system of slides It will readily be seen that when the lever To this end the under face of the S the companion or complementary projection Z diametrically opposite will act upon the pawl r and move it outwardly along the incline on the under face of lever 1', so as to allow its spring j" to force said lever down and move its pin r into the slot of one or the other couplingplate g or q.

The progressive'fced motion crosswise of the buttonhole in barring one end thereof is imparted to the work-holder I K by one or the other of the projections 2- on disk 0' acting upon a roller 1' on a stud or post 71 sooured to slide S, Figs. 2 and 3, substantially as shown and described in our application of even date with this.

Having thus described our invention, what we claim as new therein, and desire to secure by Letters Patent, is

1. In a buttonhole-sewing machine such as described, the combination with the stitchforming appliances, the work holder, the switch-cam M, switch-cam lever M the feedwheel Q connected with and adapted to receive its progressive rotation from said switchcam lever, the feed-disk 0' provided with a cam-groove 0 having concentric portions diametrically opposite each other of greater width than its eccentric portions, the slides 11 and s of a system of slides S, said slide 1') provided with a pin 1) projecting into camgroove 0', a connecting-bar connected with the switch-cam lever, and means for coupling said bar with said slide .9 whereby said work-holder receives a reciprocating motion crosswise of the buttonhole andaprogressive feed motion lengthwise thereof when the aforesaid pin 2) is acted upon by an eccentric portion of said cam-groove 0 in disk 0; of mechanisms adapted toim part to the workholder a progressive teed motion crosswise of the buttonhole and simultaneously therewith a-reciprocating motion lengthwise of said buttonhole, and a shifting-lever adapted to uncouple the aforesaid connecting-bar from the mechanism which imparts to the work-holder a reciprocating motion crosswise of the buttonhole and couple the same to the mechanism which imparts to said work-holder a reciprocating motion lengthwise of the buttonhole, substantially as and for the purpose set forth.

2. In a buttonhole-sewingmachine such as described, the combination with the stitchforming appliances, the work holder, the switch-cam M, switch-cam lever M the feedwheel Q connected with and adapted to receive its progressive rotation from said switchcam lever, the feed-disk O providedwith a cam-groove 0 having concentric portions diametrically opposite' each other of greater width than its eccentric portions, the slides 19 and s of a system of slides S, said slide 1 provided with a pin p projecting into camgroove 0, a' connecting-bar connected with the switch-cam lever, and means for coupling said bar with said slide 5 whereby said work-holder receives a reciprocating motion erated by the switch-cam lever and adapted.

crosswise of the buttonhole andaprogressive feed motionlengthwise thereof when the aforesaid pin is acted upon by an eccentric portion of said cam groove 0 in disk 0': of mechanisms adapted to impart to the work-holder a progressive feed motion cross wise ofthe buttonhole and simultaneously 'srewith a reciprocating motion lengthwise of said buttonhole, and ashifting-lever adapted to uncouple the aforesaid connecting-bar from the mechanism which imparts to the work-holder a reciprocating motion crosswise of the buttonhole and couple the same to the mechanism which imparts to said work-holder a reciprocating motion-lengthwise of the but: tonhole, and means whereby the operations of the aforesaid mechanisms are repeated to first bind one edge of a buttonhole, then bar one end by stitches laid as set forth, then bind the opposite edge and bar the opposite end of such buttonhole, substantially as de-' scribed.

23. In a buttonhole-sewing machine such as described, the combination with the'slitchforming appliances, the work holder, the switch-cam M, switch-cam lever M the feedwheel Q connected with and adapted to receive a progressive rotation from said lever, the feed-disk 0 provided with a cam-groove 0' having concentric portions diametrically opposite each other of greater width than its eccentric portions, the slides and s of the system of slides S, said slide provided with a pin 1) projecting into the aforesaid cam-' groove, a connecting-bar connected with the switch-cam lever, and means for coupling said bar with slide s ,whcrcby the work-holder receives a progressive motion lengthwise of the buttonhole and a reciprocating motion crosswise thereof when the aforesaid pin is acted upon by an eccentric portion of cam groove 0 in disk 0'; of mechanism adapted to impart to the work-holder a progressive feed motion crosswise of the buttonhole, a slide parallel with the major axis of the buttonhole arranged above the work holder, means for coupling the latter to said slide, mechanism adapted to impart a reciprocating motion to the slide, a shifting-lever adapted to shift the aforesaid connecting-bar out of engagement with slide 3 into engagement with the mechanism that reciprocates tlielastnamed slide, substantially as and for the purpose set forth.

4. In a buttonhole-sewing machine such as described, the combination with the switchcam M, switch-cam lever M the wprk-holder, the slide '2' and intermediate mechanism opto impart to slide 7' a reciprocating motion lengthwise of the buttonhole, the couplinglever 7'' adapted to couple slide 7* with the work-holder, said'lever having its under face inclined downwardly from its free end; of the feed-wheel Q, revolved progressively by the periphery of said disk 0' and provided with an extension in engagement with the inclined under face of lever r, substantially as and for the purpose set forth.

5. The combination with the feed-wheel Q, the mechanism for imparting thereto a progressive feed motion, the disk 0' provided with the peripheral projection 1, the Work-holder P K the coupling plates q 1 thereof, the slide 1', the mechanism for reciprocating said slide and the actuating-bar on; of the lovers Z Z, the latter lever adapted to shift the aforesaid bar m into engagement with the mechanism that reeiprocates slide '7- a'nd the former lever l lying in the path of the projections Z on disk O', the pawl it also in the path of said projections and provided with an extension r, and the spring-actuated lever R having its under face inclined as described and engaged by the extension a of pawl n substantially I as and for the purpose set forth.

6. In a buttonhole-sewing machine, the combination with the stitch-forming appliances, the work-holder, the system of slides S, a connection between one of the slides of said system and said work-holder, the progressively-1-e\-'olving feed-disk 0 provided with a cam-groove having concentric portions diametrically opposite each other of greater width than the eccentric portions, and a pin on slide p of the system of slides projecting into the cam-groove of disk 0'; of means for reciprocating the work-holder lengthwise of the buttonhole when said pin lies in a widened portion of the aforesaid cam -groove, and means operating independently of the aforesaid feed-disk for simultaneously imparting to the work-holder a progressive motion crosswise of the buttonhole on barring one end thereof, substantially as set forth.

In testimony that we claim the foregoing as our invention we have hereto signed our names in presence of the subscribing witnesses.

JULIUS GUTMANN. EMIL FALLER. KARL MISCHKE. 

